how to change the title name of ggplot in a loop?

Question

There is a loop generate the multiple plots. My question is I want the title name change for each iteration. for example "plot1","plot2","plot3".........

what if I want a sentence for the plot title, say"This is the 1 plot we have","This is the 2 plot we have"

library(tidyverse)

# create a list with a specific length 
plot_lst <- vector("list", length = 8)

for (i in 1:8) {
  g <- ggplot(data = mtcars, aes(x = hp, y = wt)) +
    geom_point()+ggtitle("plot1")
  plot_lst[[i]] <- g
}

# Combine all plots
cowplot::plot_grid(plotlist = plot_lst, nrow = 4)

score 1 · Accepted Answer · answered Jan 21 '21 at 22:23

1

Try this:

library(tidyverse)

# create a list with a specific length 
plot_lst <- vector("list", length = 8)

for (i in 1:8) {
  g <- ggplot(data = mtcars, aes(x = hp, y = wt)) +
    geom_point()+ggtitle(paste0("plot",i))
  plot_lst[[i]] <- g
}

# Combine all plots
cowplot::plot_grid(plotlist = plot_lst, nrow = 4)

Output:

answered Jan 21 '21 at 22:23

Duck

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what if I want a sentence for the plot title, say"This is the 1 plot we have","This is the 2 plot we have"............... – AI Kidds Jan 21 '21 at 22:29
You can use in the end of loop this: `+ggtitle(paste0("This is the ",i,"plot we have"))` let me know if that works. Just change last part with the mentionated code! – Duck Jan 21 '21 at 22:37
works, thanks professor – AI Kidds Jan 21 '21 at 22:49
@AIKidds Always a pleasure helping you! – Duck Jan 21 '21 at 22:50

how to change the title name of ggplot in a loop?

1 Answers1